CN101066975B - Europium complex with visible light sensitized light emitting performance and its synthesis process - Google Patents
Europium complex with visible light sensitized light emitting performance and its synthesis process Download PDFInfo
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Abstract
The present invention discloses one kind of europium complex with visible light sensitized light emitting performance and its synthesis process. The europium complex of the present invention as one REcomplex has structure as shown. The europium complex has excellent visible light sensitized light emitting performance, and may be applied in synthesizing biological fluorescent probe and other functional materials with excellent light emitting performance and possesses important application in biosensing, imaging, fluoresce immunoassay, etc.
Description
Technical field
The present invention relates to a kind of europium complex and synthetic method thereof with visible light sensitized light emitting performance.
Background technology
The distinct electrical minor structure of rare earth ion makes its compound have many special spectral qualities.They have significant application value at aspects such as luminescent device (electricity-saving lamp, photodiode, indicating meter), optical fiber, optical amplifier, laser, bio-sensing, bio-imaging and fluoroimmunoassays.Rare earth ion can reduce the fluorescence interference that biomaterial itself produces in the sharp line emission and the long luminous attitude life-span (ms level) of visible or near-infrared region, make to detect to have very high sensitivity and efficient, avoided a series of problems of using radioelement to bring simultaneously.
Because the f-f transition of rare earth ion is subjected to eelctric dipole to select the restriction of rate, the light absorpting ability of rare earth ion itself is very weak, molar extinction coefficient is very little, therefore to obtain luminescent properties preferably, need carry out sensitization to rare earth ion, promptly pass through part (or charge transfer state) extinction, and make energy be transferred to the rare earth luminescence attitude to realize the efficiently luminous of rare earth ion as sensitizing agent.Though many rare earth compoundings are under ultraviolet excitation, show luminescent properties preferably, but UV-light is to the organism damage and disturb bigger, also can produce stronger background fluorescence, therefore, become one of important research direction (K.Kuningas to the luminous efficiency that excites window and improve rare earth compounding of long wave direction expansion rare earth compounding, et al., Anal.Chem.2005,77,7348).WO2003076938-A has reported the two class rare earth ion title complexs that contain terpyridyl structured light sensitization part and two pyrazoles-pyridine structure photosensitization part.Wherein with N, N, N ', N '-[(4 '-(5 ' " amino-2 ' "-thienyl)-2,2 ': 6 ', 2 " terpyridyls-6,6 ", two bases) two (methylene radical itrile groups)] acetate (N, N, N ', N '-[(4 '-(5 ' " amino-2 ' "-thienyl)-2,2 ': 6 ', 2 " terpyridine-6,6 " diyl) bis (methylenenitrilo)] tetrakis (acetate)) as the Eu of sensitization part
3+The peak value of the excitation spectrum of title complex appears at the 336nm place, and it excites the window afterbody to extend to 410nm, and fluorescence quantum yield is 0.15.In recent years, the present inventor designs, has synthesized a kind of novel rare-earth title complex [Eu (tta)
3Dpbt] (tta is the thenoyltrifluoroacetone negative ion for dpbt=2-(N, N-Diethyl Aniline-4-yl)-4,6-two (3-1-yl)-1,3,5-triazines).(concentration is 10 to be dissolved in this title complex in the toluene
-5The dilute solution of M) the window that excites can extend to 441nm, and this title complex has very high luminescent quantum productive rate (0.52) (Y.Wang, et al., Angew.Chem.Int.Ed.2004,43,5010).If with this type of rare earth compounding fluorescence dye serves as that basis preparation biological fluorescent labeling is applied to fluoroimmunoassay, the employing longwave optical excites, and will make advantages such as fluoroimmunoassay has highly sensitive, high s/n ratio concurrently, penetration depth is big, little with interference to the organism damage, analysis cost is low.
Create the novel rare-earth complex luminescent material, make it as seen to send out and excite and have bigger rare-earth fluorescent quantum yield (Φ) and luminous power down that (Φ * ε) has important application value at long wave.
The present inventor has synthesized a class photosensitive molecular part, and its structure is suc as formula shown in the II: its synthetic method may further comprise the steps:
Structure suc as formula compound shown in a and three polychlorostyrene piperazines (cyanuryl chloride, cyanuric chloride) reaction, with pyrazoles negative ion shown in gained reaction product and the formula b or the reaction of substituted pyrazolecarboxylic negative ion, is made the photosensitive organic molecule ligand shown in the formula II;
Formula a, formula c, R among the formula II
1, R
2For carbonatoms is the alkyl of 1-4, R
3, R
4Be methyl or H; X is haloid elements such as I, Br, Cl; R among the formula b
5=R
7Be methyl or H; R among the formula II
5=R
6=R
7=R
8Be methyl or H.
Wherein, structure is that compound shown in the formula c and lithium alkylide are reacted prepared product suc as formula the compound shown in a; The carbonatoms of wherein said lithium alkylide is 1-8.
Summary of the invention
The purpose of this invention is to provide a kind of europium complex and synthetic method thereof with visible light sensitized light emitting performance.
Europium complex provided by the present invention, its structure be suc as formula shown in the I, wherein R
1, R
2Be that carbonatoms is 1 to 4 alkyl, R
3, R
4Be methyl or H, R
5=R
6=R
7=R
8Be methyl or H; Be preferably R among the described formula I
1=R
2=ethyl, R
3=R
4=H, R
5=R
6=R
7=R
8=methyl.
Synthetic method with europium complex of visible light sensitized light emitting performance provided by the present invention is with the compound reaction of structure suc as formula compound and structure such as the formula III of II, obtains the Photostimulable luminescence europium complex of described structure suc as formula I.
R among its Chinese style II
1, R
2Be that carbonatoms is 1 to 4 alkyl, R
3, R
4Be methyl or H, R
5=R
6=R
7=R
8Be methyl or H.
In the described method, the mol ratio of described structural formula compound reaction shown in formula III suc as formula compound shown in the II and structural formula is 1: 1.
In the described method, described structural formula suc as formula the temperature of compound shown in the II and the structural formula compound reaction shown in formula III is-10-100 ℃.
In the described method, described reaction is all carried out in organic solvent, and described organic solvent is one or more in tetrahydrofuran (THF), ether, benzene,toluene,xylene, chloroform and the methylene dichloride.
Structure provided by the present invention has very high rare-earth fluorescent quantum yield suc as formula the europium complex shown in the I under excited by visible light.In formula I, R
1=R
2=H
3CH
2C-, R
3=R
4=H, R
5=R
6=R
7=R
8=H
3The europium complex IV of C-is an example, its Eu
3+Fluorescence quantum yield is up to 0.94 (λ
Ex=411nm), far above being seen in so far in other visible light sensitized light emitting rare-earth luminescent material of report.The peak value of this europium complex excitation spectrum is at the 403nm place, and afterbody is extended to 441nm, and (concentration is 1.0 * 10
-5M).Under natural light irradiation, this europium complex that not only is dissolved in the toluene can send pure ruddiness, and its solid also can send stronger ruddiness.This compound is the strongest rare earth compounding of visible light sensitized light emitting ability up to now.Other structure also has good visible light sensitized light emitting performance suc as formula the europium complex shown in the I.In a word, rare earth compounding of the present invention has the excellent visible light sensitized light emitting performance, can be used for the functional materialss such as biological fluorescent labeling of synthetic luminescent properties excellence, have significant application value and bright prospects at aspects such as bio-sensing, imaging and fluoroimmunoassays.
Description of drawings
Fig. 1 is the fluorescence excitation spectrogram (λ of the europium complex shown in the formula IV of the present invention
Em=614nm);
Fig. 2 is the fluorescent emission spectrogram (λ of the europium complex shown in the formula IV of the present invention
Ex=411nm);
Fig. 3 is the europium complex shown in the formula IV of the present invention
1H NMR figure.
Embodiment
In order to be described more specifically the present invention, now provide some embodiment.But content involved in the present invention is not limited only to these examples.Method among the following embodiment if no special instructions, is ordinary method.Used raw material all can be commercially available in reaction.
A class of the present invention has the synthetic method of the europium complex of visible light sensitized light emitting performance, and its reaction process is as described below:
Its Chinese style I, the R among the formula II
1, R
2Be that carbonatoms is 1 to 4 alkyl, R
3, R
4Be methyl or H, R
5=R
6=R
7=R
8Be methyl or H.
The synthetic method of europium complex of the present invention, its concrete steps are as described below:
The compound of structure such as formula III and the structure compound suc as formula II is reacted in organic solution, obtain structure suc as formula the described Photostimulable luminescence europium complex of I.
Above-mentioned reaction can be carried out in many organic solvents, ether solvent such as tetrahydrofuran (THF), ether for example, aromatic solvents such as benzene,toluene,xylene, chlorinated solvent such as chloroform, methylene dichloride.
With following embodiment is example, specifies the synthetic method and the effect thereof of the europium complex shown in the above-mentioned formula I.
Embodiment 1, composite structure formula (are R among the formula I suc as formula the europium complex shown in the IV
1=R
2==H
3CH
2C-, R
3=R
4=H, R
5=R
6=R
7=R
8=H
3C-)
Get N; N-diethyl para-bromoaniline 4mmol is dissolved in the dry tetrahydrofuran (THF) of crossing logical argon gas deoxygenation; place-78 ℃ dry ice acetone bath; under argon shield, add 6.4mmol n-BuLi, slowly be warming up to room temperature after; continue to stir 30min; its adding is frozen among the three polychlorostyrene piperazine 5.4mmol under-78 ℃, slowly be warming up to room temperature after, continue to stir 60min.Except that after desolvating, product separates with silica gel column chromatography, and eluent is a methylene dichloride.With the thick product of gained recrystallization in sherwood oil, obtain 2-(N, N-Diethyl Aniline-4-yl)-4, the yellow needle-like crystal 0.65g of 6-two chloro-1,3,5-triazines.Under argon shield, the potassium metal 1.25mmol that newly cuts is added in the anhydrous tetrahydro furan; Add 3 1.75mmol, reflux 3h generates the 3 negative ion; Reaction mixture is placed ice bath, to wherein adding 2-(N, N-Diethyl Aniline-4-yl)-4,6-two chloro-1,3,5-triazines 0.5mmol, stirring at room 1h, back flow reaction 8-9h in 80-85 ℃ oil bath then.The cooling back concentrates, and makes eluent with the mixed solution (volume ratio of methylene dichloride and ethyl acetate is 3: 1) of methylene dichloride and ethyl acetate, separates by silica gel column chromatography.The gained crude product gets structure suc as formula (R shown in the II with mixed solution (volume ratio of sherwood oil and methylene dichloride is 1: the 1) recrystallization of sherwood oil and methylene dichloride
1=R
2=H
3CH
2C-, R
3=R
4=H, R
5=R
6=R
7=R
8=H
3The yellow needle-like crystal 0.18g of ligand molecular C-).
Get in the tetrahydrofuran (THF) that the compound 0.05mmol of structure shown in formula III be dissolved in 30mL and make solution A, get structure suc as formula (R shown in the II
1=R
2=H
3CH
2C-, R
3=R
4=H, R
5=R
6=R
7=R
8=H
3C-) ligand compound 0.05mmol is dissolved in the 30mL tetrahydrofuran (THF) and makes Solution H, and solution A is dropwise added in the Solution H.25 ℃ are stirred 1h, and the evaporated under reduced pressure solvent gets the orange/yellow solid 72.7mg of structure suc as formula IV.
The above-mentioned orange/yellow solid that obtains is carried out mass spectrum (MALDI-TOF MS) analysis, record molecular ion peak M/Z=1454; Ultimate analysis (quality percentage composition): C, 43.66% (43.78%); H, 4.38% (4.02%); N, 7.43% (7.71%), in the bracket theoretical value; It is the europium complex shown in the formula IV that nuclear magnetic resonance spectrum characterizes the above-mentioned orange/yellow solid product of proof, its
1H NMR spectrum as shown in Figure 3.
Fluorescence excitation spectrum (the λ of the europium complex shown in the formula IV
Em=614nm) as shown in Figure 1; Fluorescence emission spectrum (the λ of this title complex
Ex=411nm) as shown in Figure 2.The result of Fig. 1-2 shows that europium complex provided by the present invention has the excellent visible light sensitized light emitting performance.Dimethyl sulfoxide solution with 4-dicyanomethylene-2-methyl-6-p-dimethylaminostyrl-4H-py ran (DCM) is reference substance (Φ=0.8, J.M.Drake, et.al., Chem.Phys.Lett.1985,113,530-534.), at wavelength is under the 411nm excitation light irradiation, the europium ion fluorescence quantum yield that records the europium complex shown in the formula IV is 0.94 (the detection wavelength is 614nm), and this quantum yield is far above the rare-earth fluorescent quantum yield of other known visible light sensitized light emitting europium complex.
Europium complex shown in embodiment 2, the synthesis type V (is R among the formula I
1=R
2=H
3C-, R
3=R
4=H, R
5=R
6=R
7=R
8=H
3C-)
According to the synthetic method of embodiment 1, use N, the N-dimethylated replaces N, and N-diethyl para-bromoaniline syntheticly obtains structure suc as formula (R shown in the II
1=R
2=H
3C-, R
3=R
4=H, R
5=R
6=R
7=R
8=H
3C-) ligand compound.
Get in the tetrahydrofuran (THF) that the compound 0.05mmol of structure shown in formula III be dissolved in 30mL and make solution A, get structure suc as formula (R shown in the II
1=R
2=H
3C-, R
3=R
4=H, R
5=R
6=R
7=R
8=H
3C-) ligand compound 0.05mmol is dissolved in the 30mL tetrahydrofuran (THF) and makes solution I, and solution A is dropwise added in the solution I.Behind 25 ℃ of stirring 1h, the evaporated under reduced pressure solvent gets the orange/yellow solid 71.3mg of structure suc as formula V.
The above-mentioned orange/yellow solid that obtains is carried out mass spectrum (MALDI-TOF MS) analysis, record molecular ion peak M/Z=1426; Ultimate analysis (quality percentage composition): C, 43.29% (42.96%); H, 3.77% (3.82%); N, 7.65% (7.86%), in the bracket theoretical value; The structural formula that nuclear magnetic resonance spectrum characterizes proof orange/yellow solid product is formula V.
According to the method for embodiment 1, be under the 411nm excitation light irradiation at wavelength, recording structure is 0.90 (the detection wavelength is 614nm) suc as formula the europium ion fluorescence quantum yield of the europium complex of V.
Title complex shown in embodiment 3, the synthesis type VI (is R among the formula I
1=R
2=n-H
9C
4-, R
3=R
4=H, R
5=R
6=R
7=R
8=H
3C-)
According to the synthetic method of embodiment 1, use N, N-dibutyl para-bromoaniline replaces N, and N-diethyl para-bromoaniline syntheticly obtains structure suc as formula (R shown in the II
1=R
2=n-H
9C
4-, R
3=R
4=H, R
5=R
6=R
7=R
8=H
3C-) ligand compound.
Get in the ether that the compound 0.05mmol of structure shown in formula III be dissolved in 30mL and make solution B, get structure suc as formula (R shown in the II
1=R
2=n-H
9C
4-, R
3=R
4=H, R
5=R
6=R
7=R
8=H
3C-) ligand compound 0.05mmol is dissolved in and makes solution J in the 30mL ether, and solution B is dropwise added among the solution J.Behind 25 ℃ of stirring 1h, the evaporated under reduced pressure solvent gets the orange/yellow solid 75.5mg of structure suc as formula VI.
The above-mentioned orange/yellow solid that obtains is carried out mass spectrum (MALDI-TOF MS) analysis, record molecular ion peak M/Z=1510; Ultimate analysis (quality percentage composition): C, 45.66% (45.34%); H, 4.22% (4.41%); N, 7.33% (7.42%), in the bracket theoretical value; The structural formula that nuclear magnetic resonance spectrum characterizes the above-mentioned orange/yellow solid product of proof is formula VI.
According to the method for embodiment 1, be under the 411nm excitation light irradiation at wavelength, the europium ion fluorescence quantum yield that records formula VI europium complex is 0.87 (the detection wavelength is 614nm).
Europium complex shown in embodiment 4, the synthesis type VII (is R among the formula I
1=R
2=H
3CH
2C-, R
3=R
4=R
5=R
6=R
7=R
8=H
3C-)
Get N, N-diethyl-2,6-dimethyl-para-bromoaniline 4mmol; be dissolved in the dry tetrahydrofuran (THF) of crossing; logical argon gas deoxygenation places-78 ℃ dry ice acetone bath, under argon shield; add 6.4mmol n-BuLi; after slowly being warming up to room temperature, continue to stir 30min, its adding is frozen among the three polychlorostyrene piperazine 5.4mmol under-78 ℃; after slowly being warming up to room temperature, continue to stir 60min.Except that after desolvating, product separates with silica gel column chromatography, and eluent is a methylene dichloride.With the thick product of gained recrystallization in sherwood oil, obtain 2-(N, N-diethyl-2,6-xylidine-4-yl)-4, the yellow needle-like crystal 0.65g of 6-two chloro-1,3,5-triazines.Under argon shield, the potassium metal 1.25mmol that newly cuts is added in the anhydrous tetrahydro furan; Add 3 1.75mmol, reflux 3h generates the 3 negative ion; Reaction mixture is placed ice bath, to wherein adding 2-(N, N-diethyl-2,6-xylidine-4-yl)-4,6-two chloro-1,3,5-triazines 0.5mmol, stirring at room 1h, back flow reaction 8-9h in 80-85 ℃ oil bath then.The cooling back concentrates, and makes eluent with the mixed solution (volume ratio of methylene dichloride and ethyl acetate is 3: 1) of methylene dichloride and ethyl acetate, separates by silica gel column chromatography.The gained crude product gets structure suc as formula (R shown in the II with mixed solution (volume ratio of sherwood oil and methylene dichloride is 1: the 1) recrystallization of sherwood oil and methylene dichloride
1=R
2=H
3CH
2C-, R
3=R
4=R
5=R
6=R
7=R
8=H
3The yellow needle-like crystal 90mg of ligand molecular C-).
Get in the chloroform that the compound 0.05mmol of structure shown in formula III be dissolved in 30mL and make solution C, get structure suc as formula (R shown in the II
1=R
2=H
3CH
2C-, R
3=R
4=R
5=R
6=R
7=R
8=H
3C-) ligand compound 0.05mmol is dissolved in and makes solution K in the 30mL chloroform, and solution C is dropwise added among the solution K.After stirring 1h under-10 ℃, the evaporated under reduced pressure solvent gets the orange/yellow solid 74.1mg of structure suc as formula VII.
The above-mentioned orange/yellow solid that obtains is carried out mass spectrum (MALDI-TOF MS) analysis, record molecular ion peak M/Z=1482; Ultimate analysis (quality percentage composition): C, 44.70% (44.57%); H, 4.19% (4.22%); N, 7.47% (7.56%), in the bracket theoretical value; The structural formula that nuclear magnetic resonance spectrum characterizes the above-mentioned product of proof is formula VII.
According to the method for embodiment 1, be under the 411nm excitation light irradiation at wavelength, the europium ion fluorescence quantum yield that records the europium complex shown in the formula VII is 0.93 (the detection wavelength is 614nm).
Europium complex shown in embodiment 5, the synthesis type VIII (is R among the formula I
1=R
2=R
3=R
4=R
5=R
6=R
7=R
8=H
3C-)
According to the synthetic method of embodiment 4, use N, N-dimethyl-2,6-dimethyl-para-bromoaniline replaces N, N-diethyl-2,6-dimethyl-para-bromoaniline syntheticly obtains structure suc as formula (R shown in the II
1=R
2=R
3=R
4=R
5=R
6=R
7=R
8=H
3C-) ligand compound.
Get in the toluene that the compound 0.05mmol of structure shown in formula III be dissolved in 30mL and make solution D, get structure suc as formula (R shown in the II
1=R
2=R
3=R
4=R
5=R
6=R
7=R
8=H
3C-) ligand compound 0.05mmol is dissolved in and makes solution L in the 30mL toluene, and solution D is dropwise added among the solution L.Under argon shield, behind 100 ℃ of stirring 1h, the evaporated under reduced pressure solvent gets the orange/yellow solid 72.7mg of structure suc as formula VIII.
The above-mentioned orange/yellow solid that obtains is carried out mass spectrum (MALDI-TOF MS) analysis, record molecular ion peak M/Z=1454; Ultimate analysis (quality percentage composition): C, 43.67% (43.78%); H, 4.04% (4.02%); N, 7.79% (7.71%), in the bracket theoretical value; The structural formula that nuclear magnetic resonance spectrum characterizes the above-mentioned orange/yellow solid product that obtains of proof is formula VIII.
According to the method for embodiment 1, be under the 411nm excitation light irradiation at wavelength, the europium ion fluorescence quantum yield that records formula VIII europium complex is 0.85 (the detection wavelength is 614nm).
Europium complex shown in embodiment 6, the synthesis type IX (is R among the formula I
1=R
2=n-H
9C
4-, R
3=R
4=R
5=R
6=R
7=R
8=H
3C-)
According to the synthetic method of embodiment 4, use N, N-dibutyl-2,6-dimethyl-para-bromoaniline replaces N, N-diethyl-2,6-dimethyl-para-bromoaniline syntheticly obtains structure suc as formula (R shown in the II
1=R
2=n-H
9C
4-, R
3=R
4=R
5=R
6=R
7=R
8=H
3C-) ligand compound.
Get in the benzene that the compound 0.05mmol of structure shown in formula III be dissolved in 30mL and make solution E, get structure suc as formula (R shown in the II
1=R
2=n-H
9C
4-, R
3=R
4=R
5=R
6=R
7=R
8=H
3C-) ligand compound 0.05mmol is dissolved in and makes solution M in the 30mL benzene, and solution E is dropwise added among the solution M.Behind 50 ℃ of stirring 1h, the evaporated under reduced pressure solvent gets the orange/yellow solid 76.9mg of structure suc as formula IX.
The above-mentioned orange/yellow solid that obtains is carried out mass spectrum (MALDI-TOF MS) analysis, record molecular ion peak M/Z=1538; Ultimate analysis (quality percentage composition): C, 45.87% (46.07%); H, 4.72% (4.59%); N, 7.25% (7.28%), in the bracket theoretical value; The structural formula that nuclear magnetic resonance spectrum characterizes the above-mentioned orange/yellow solid product that obtains of proof is formula IX.
According to the method for embodiment 1, be under the 411nm excitation light irradiation at wavelength, the europium ion fluorescence quantum yield that records the europium complex shown in the formula IX is 0.75 (the detection wavelength is 614nm).
Europium complex shown in embodiment 7, the synthesis type X (is R among the formula I
1=R
2=H
3CH
2C-, R
3=R
4=R
5=R
6=R
7=R
8=H)
Synthetic method according to embodiment 1 replaces 3 with pyrazoles, synthesizes to obtain structure suc as formula (R shown in the II
1=R
2=H
3CH
2C-, R
3=R
4=R
5=R
6=R
7=R
8=H) ligand compound.
Get in the tetrahydrofuran (THF) that the compound 0.05mmol of structure shown in formula III be dissolved in 30mL and make solution A, get structure suc as formula (R shown in the II
1=R
2=H
3CH
2C-, R
3=R
4=R
5=R
6=R
7=R
8=H) ligand compound 0.05mmol is dissolved in and makes solution N in the 30mL tetrahydrofuran (THF), solution A is dropwise added among the solution N.Behind 25 ℃ of stirring 1h, the evaporated under reduced pressure solvent gets the orange/yellow solid 69.8mg of structure suc as formula X.
The above-mentioned orange/yellow solid that obtains is carried out mass spectrum (MALDI-TOF MS) analysis, record molecular ion peak M/Z=1398; Ultimate analysis (quality percentage composition): C, 41.80% (42.10%); H, 3.63% (3.61%); N, 8.21% (8.02%), in the bracket theoretical value; The structural formula that nuclear magnetic resonance spectrum characterizes the above-mentioned orange/yellow solid that obtains of proof is formula X.
Europium complex shown in embodiment 8, the synthesis type XI (is R among the formula I
1=R
2=H
3CH
2C-, R
3=R
4=H
3C-, R
5=R
6=R
7=R
8=H)
Synthetic method according to embodiment 4 replaces 3 with pyrazoles, synthesizes to obtain structure suc as formula (R shown in the II
1=R
2=H
3CH
2C-, R
3=R
4=H
3C-, R
5=R
6=R
7=R
8=H) ligand compound.
Get in the methylene dichloride that the compound 0.05mmol of structure shown in formula III be dissolved in 30mL and make solution F, get structure suc as formula (R shown in the II
1=R
2=H
3CH
2C-, R
3=R
4=H
3C-, R
5=R
6=R
7=R
8=H) ligand compound 0.05mmol is dissolved in and makes solution P in the 30mL methylene dichloride, solution F is dropwise added among the solution P.Behind 25 ℃ of stirring 1h, the evaporated under reduced pressure solvent gets the orange/yellow solid 71.3mg of structure suc as formula XI.
The above-mentioned orange/yellow solid that obtains is carried out mass spectrum (MALDI-TOF MS) analysis, record molecular ion peak M/Z=1426; Ultimate analysis (quality percentage composition): C, 42.64% (42.96%); H, 3.96% (3.82%); N, 7.99% (7.86%), in the bracket theoretical value; The structural formula that nuclear magnetic resonance spectrum characterizes the above-mentioned orange/yellow solid product that obtains of proof is formula XI.
Europium complex shown in embodiment 9, the synthesis type XII (is R among the formula I
1=H
3C-, R
2=n-H
9C
4-, R
3=R
4=R
5=R
6=R
7=R
8=H
3C-)
According to the synthetic method of embodiment 4, with N-methyl-N-butyl-2,6-dimethyl-para-bromoaniline replaces N, N-diethyl-2, and 6-dimethyl-para-bromoaniline syntheticly obtains structure suc as formula (R shown in the II
1=H
3C-, R
2=n-H
9C
4-, R
3=R
4=R
5=R
6=R
7=R
8=H
3C-) ligand compound.
Get in the tetrahydrofuran (THF) that the compound 0.05mmol of structure shown in formula III be dissolved in 30mL and make solution A, get structure suc as formula (R shown in the II
1=H
3C-, R
2=n-H
9C
4-, R
3=R
4=R
5=R
6=R
7=R
8=H
3C-) ligand compound 0.05mmol is dissolved in and makes solution Q in the 30mL benzene, and solution A is dropwise added among the solution Q.Behind 50 ℃ of stirring 1h, the evaporated under reduced pressure solvent gets the orange/yellow solid 74.8mg of structure suc as formula XIII.
The above-mentioned orange/yellow solid that obtains is carried out mass spectrum (MALDI-TOF MS) analysis, record molecular ion peak M/Z=1496; Ultimate analysis (quality percentage composition): C, 45.17% (44.96%); H, 4.39% (4.31%); N, 7.34% (7.49%), in the bracket theoretical value; The structural formula that nuclear magnetic resonance spectrum characterizes the above-mentioned orange/yellow solid product that obtains of proof is formula XII.
Europium complex shown in embodiment 10, the synthesis type XIII (is R among the formula I
1=H
3C-, R
2=n-H
9C
4-, R
3=R
4=H, R
5=R
6=R
7=R
8=H
3C-)
According to the synthetic method of embodiment 1, replace N with N-methyl-N-butyl para-bromoaniline, N-diethyl para-bromoaniline syntheticly obtains structure suc as formula (R shown in the II
1=H
3C-, R
2=n-H
9C
4-, R
3=R
4=H, R
5=R
6=R
7=R
8=H
3C-) ligand compound.
Get in the tetrahydrofuran (THF) that the compound 0.05mmol of structure shown in formula III be dissolved in 30mL and make solution A, get structure suc as formula (R shown in the II
1=H
3C-, R
2=n-H
9C
4-, R
3=R
4=H, R
5=R
6=R
7=R
8=H
3C-) ligand molecular 0.05mmol is dissolved in and makes solution R in the 30mL ether, and solution A is dropwise added among the solution R.Behind 25 ℃ of stirring 1h, the evaporated under reduced pressure solvent gets the orange/yellow solid 73.4mg of structure suc as formula XIII.
The above-mentioned orange/yellow solid that obtains is carried out mass spectrum (MALDI-TOF MS) analysis, record molecular ion peak M/Z=1468; Ultimate analysis (quality percentage composition): C, 45.29% (44.18%); H, 4.06% (4.12%); N, 7.61% (7.63%), in the bracket theoretical value; The structural formula that nuclear magnetic resonance spectrum characterizes the above-mentioned orange/yellow solid product that obtains of proof is formula XIII.
Embodiment 11, synthesis type XIV europium complex (are R among the formula I
1=R
2=H
3CH
2C-, R
3=H, R
4=R
5=R
6=R
7=R
8=H
3C-)
According to the synthetic method of embodiment 4, use N, N-diethyl-2-methyl-para-bromoaniline replaces N, N-diethyl-2,6-dimethyl-para-bromoaniline syntheticly obtains structure suc as formula (R shown in the II
1=R
2=H
3CH
2C-, R
3=H, R
4=R
5=R
6=R
7=R
8=H
3C-) ligand compound.
Get in the tetrahydrofuran (THF) that the compound 0.05mmol of structure shown in formula III be dissolved in 30mL and make solution A, get structure suc as formula (R shown in the II
1=R
2=H
3CH
2C-, R
3=H, R
4=R
5=R
6=R
7=R
8=H
3C-) ligand compound 0.05mmol is dissolved in the 30mL toluene and makes solution S, and solution A is dropwise added in the solution S.Under nitrogen protection, behind 30 ℃ of stirring 1h, the evaporated under reduced pressure solvent gets the orange/yellow solid 73.4mg of structure suc as formula XIV.
The above-mentioned orange/yellow solid that obtains is carried out mass spectrum (MALDI-TOF MS) analysis, record molecular ion peak M/Z=1468; Ultimate analysis (quality percentage composition): C, 45.34% (44.18%); H, 4.09% (4.12%); N, 7.72% (7.63%), in the bracket theoretical value; The structural formula that nuclear magnetic resonance spectrum characterizes the above-mentioned orange/yellow solid product that obtains of proof is formula XIV.
According to the method for embodiment 1, be under the 411nm excitation light irradiation at wavelength, the europium ion fluorescence quantum yield that records the europium complex shown in the formula IX is 0.70 (the detection wavelength is 614nm).
The foregoing description shows that structure provided by the present invention has the excellent visible light sensitized light emitting performance suc as formula the novel europium complex shown in the I, its visible light photoactivated europium ion fluorescence quantum yield is far above the maximum of having reported at present 0.52, simultaneously europium ion sensitized fluorescence window long wave direction shows that suc as formula the excellent sensitized light emitting performance of the title complex shown in the I it is synthetic at biological fluorescent labeling greater than 440nm. structure provided by the present invention, and fields such as bio-sensing and imaging have significant application value.
Claims (7)
1. structure is suc as formula the europium complex shown in the I:
Wherein, among the formula I, R
1, R
2Be that carbonatoms is 1 to 4 alkyl, R
3, R
4Be methyl or H, R
5=R
6=R
7=R
8Be H.
2. the synthetic method of the described europium complex of claim 1 is the compound of structure such as formula III and structure to be dissolved in the organic solvent suc as formula the compound of II react, and obtains the Photostimulable luminescence europium complex of described structure suc as formula I;
R among its Chinese style II
1, R
2Be that carbonatoms is 1 to 4 alkyl, R
3, R
4Be methyl or H, R
5=R
6=R
7=R
8Be H.
3. synthetic method according to claim 2 is characterized in that: described organic solvent is a kind of or its mixture in tetrahydrofuran (THF), ether, benzene,toluene,xylene, chloroform, the methylene dichloride.
4. synthetic method according to claim 3 is characterized in that: the compound of structure such as formula III and structure are 1: 1 suc as formula the mol ratio of the compound of II.
5. synthetic method according to claim 4 is characterized in that: the compound of structure such as formula III and structure are-10-100 ℃ suc as formula the temperature of reaction of the compound of II.
6. synthetic method according to claim 5 is characterized in that: in the described method, also comprise the organic solvent evaporation in the solution after the reaction end is removed, obtain the europium complex solid of described structure suc as formula I.
7. the application of the described europium complex fluorescence dye of claim 1 in the preparation luminescent material.
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| CN101701151B (en) * | 2008-05-21 | 2013-03-20 | 北京大学 | Fluorescent nanoparticle and preparation method and application thereof |
| CN101838476B (en) * | 2009-03-18 | 2013-03-20 | 北京大学 | A type of organic fluorescent dye compound and synthesis method and application thereof |
| CN101899038B (en) * | 2009-05-31 | 2013-07-31 | 北京大学 | Near-infrared light emitting ionic complex and preparation method thereof |
| CN102079752B (en) * | 2010-12-17 | 2013-02-20 | 沈阳化工大学 | Synthesis method of rare-earth coordination polymer with functions of mercury ion fluorescence probe |
| CN102796133B (en) * | 2011-05-27 | 2015-05-20 | 北京大学 | Rare-earth europium complex and application thereof as luminescence material |
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| CN1477175A (en) * | 2003-06-03 | 2004-02-25 | 北京大学 | Beta-diketone ligand and its europium coordination compound and europium coordinationi compound electroluminescence device |
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| CN1834094A (en) * | 2006-03-31 | 2006-09-20 | 北京大学 | Terdentate ligand contg. heteroaryl pyrazole, its Eu complex and electroluminescent element |
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